Radio and like tube socket and shield means



- Sept. 19, 1944. s. M. DEL CAMP RADIO AND LIKE TUBE SOCKET AND SHIELDMEANS Filed NOV. 7, 1942 ave-722a r. MDeZCam Gcrlpione Patented Sept.19, 1944 RADIO AND LIKE TUBE SOCKET AND SHIELD MEANS Scipione M. DelCamp, Maywood, Ill., assignor to g Corporation, Chicago,

Cinch Manufacturin 111., a corporation of Illinois Application November'7, 1942, Serial No. 464,853

5 Claims.

The present invention relates to combined tube sockets and shieldretainers for thermionic and like tubes and aims generally to improveexisting constructions of that type.

One of the primary objects of the invention is the provision of acombined tube socket mounting and shield retainer which may be attacheddirectly to the metal chassis of a radio apparatus and which willprovide a good ground connection between the shield and chassis.

A further object of the invention is to provide an efficient shieldretainer of simple construction which is economical to manufacture.

Illustrative of the invention, reference is made to the accompanyingdrawing, in which:

Fig. l is a plan view of the complete socket, tube and shield assembly;

Fig. 2 is a plan of the socket and shield retainer mounting assembly;

Fig. 3 is a central, vertical sectional view of the assembly as taken onthe line 3-3 of Fig. 1;

Fig. 4 is a detail perspective view of the socket and shield retainermounting; and

Fig. 5 is a detail perspective view of the shield.

Referring more particularly to the drawing, the socket and shieldretainer mounting advantageously comprises a socket ring and retainerformed with a metal base l which may be directly attached to a metalchassis ll of a radio or like apparatus by suitable means, as forexample rivets it. The ring base I0 is preferably formed with anupstanding annular boss 13 of size equal or conforming to thecross-sectional size and shape of the shield, and an aperture l4 thereinprovides a seat for a socket and contact assembly l upon which ismounted the pronged thermionic tube l6, as is customary. The particularspecific construction of the socket and contact assembly I5, as well asthe tube l6, may be of any type suitable for the purpose and forms nopart of the present invention.

The base ID of the ring member is preferably formed with oppositelydisposed upstanding arms I! of resilient material which are spacedlaterally a slight distance from the sides of the boss l3 so as topermit the shield to be inserted on the boss inside of the arms H. Theupper portion of the arms I! is preferably formed with a downwardlyextending finger or prong l8 which advantageously may be cut from themetal of the arms for the purpose of engaging a part of the shield l9positioned over the tube 16.

The shield l9 may be of any suitable construction but preferably is inthe form of a metal sleeve having an open lower end adapted to pass overthe boss l3. The body of the shield is preferably formed with one ormore beads 20 extending outwardly from the walls and preferably thesebeads are spaced around the periphery of the shield so that the spacesbetween them are greater than the width of the finger or prong 18 on thearms 11. Each head 20 has a centrally located stop 20 at least as wideas a prong [8 (Figs. 1 and 5) so that the end of the prong I 8 may belocated in the stop and prevent accidental rotation of the shield l9 tounfastened position. A coil spring 2| is positioned within the shieldbetween the end of the tube l6 and a portion of the end wall of theshield and serves to hold the tube in position on the socket l5 as wellas to maintain the beads 20 of the shield in engagement with the fingersor prongs l8 and to insure a good ground connection between the shieldand fingers l8.

In assembling the mounting, tube and shield, a socket and contact member15 of desired construction is assembled in the aperture M of the socketand retaining mounting and the base l0 thereof is then directly attachedto the metal chassis H by suitable means such as rivets l2, the socketmember I5 extending through an aperture in the chassis as is usual. Thetube l6 may then be mounted on the socket in the usual manner, as byinserting the prongs thereof in the prong-receiving apertures of thesocket. The shield is then positioned over the tube and as its open endis forced over the boss I 3, the spring 2| is compressed and the beads20 are forced past the fingers I 8 on the arms I! and effect a snapfastener locking engagement therewith in the stops 20*. In this positionthe coil spring 2| not only forces the tube to proper position on thesocket but forces the beads 20 against the prongs [8 to insure a goodground connection between the beads 20 of the metal shield and thefingers l8 of the arms I1.

When it is desired to remove the shield for any purpose, it may bepressed and rotated on the boss l3 so that the fingers l8 will alignwith the intervening spaces between the beads 20, in which position theshield may be readily removed. In fact, when in such position the spring2| aids in ejecting the shield from the boss and tube.

Preferably, the socket-receiving ring and arms I! are formed from asingle piece of metal as illustrated, but obviously all of theadvantages of the invention may be obtained by forming the arms on aseparate base secured in position between the base Ill and chassis ll.

Although I have illustrated and described a preferred embodiment of myinvention, I do not wish to be limited thereby because the scope of myinvention is best defined by the following claims.

I claim:

1. A tube socket and shield retainer mounting for a thermionic tube andan enclosing shield comprising a base formed with a tube socketreceiving opening therein, a shield retaining boss on said base, and asnap fastener means on said base for engagement with the sides of saidshield.

2. Tube socket and shield retainer means for shielded thermionic tubesand the like comprising a metal base attachable directly to a metalsupport, said base being formed with an upstanding boss provided with acentral aperture, said boss providing a fitted support for a metallicshield, and laterally spaced snap fastener means connected to said basefor engaging said shield for holding it in position on said boss.

3. Tube socket and shield retainer means for shielded thermionic tubesand the like comprising a metal base attachable directly to a metalsupport, said base being formed with an upstanding boss provided with acentral tube socket receiving aperture, said boss providing a fittedsupport for a metallic shield a plurality of upstanding resilient armsconnected to said base and spaced laterally from said boss, and means onsaid arms for snap fastener engagement with said shield for holding itin position on said base.

4. Tube socket shield retainer means for shielded thermionic tubes andthe like, comprising a metal base attachable directly to a metalsupport, said base being formed with an upstanding boss provided with acentral tube socket receiving aperture, said boss providing a fittedsupport for a metallic shield spaced fastening members disposed alongthe margin of said base extending outwardly and upwardly therefrom forsnap fastening engagement with a shield fitted on said boss to hold itsecurely thereon.

5. Tube socket and shield retainer means for shielded thermionic tubesand the like, comprising a metal base attachable directly to a metalsupport, said base being formed with an upstanding boss provided with acentral tube socket receiving aperture, said boss providing a fittedsupport for a metallic shield spaced fastening members disposed alongthe margin of said base extending outwardly and upwardly therefrom, theupwardly extending portions of said fastener members being formed withinwardly extending tongues for snap fastener engagement with a shieldfitted to said boss.

SCIPIONE M. DEL CAMP.

